Saharan Dust To Hit FL, Lower U.S.: Here's What To Know

The South is bracing for a Saharan dust that is expected to blow through the region as soon as this weekend, potentially impacting Fourth of July festivities.

The dust, currently traveling across the Atlantic, is forecast to enter the Gulf in coming days and bring effects in Texas, Florida and other areas.

Patch on Thursday spoke with Stephen Shively, a meteorologist with the National Weather Service's Tampa Bay office, about any possible harming effects on Floridians.

The dust could reach Florida by Sunday, heavily hitting the state's southern region. Areas south of I-4, including Miami, are set to feel the lingering effects of the dust, Shively said.

He noted the air quality in the Tampa region should not decline due to the dust.

AccuWeather reported fair air quality Thursday and Friday in the Miami area. The air quality will be poor by Saturday before returning to fair Sunday, according to the forecast.

As for Tampa Bay, Shively said the Saharan dust lowers the rain chances in an area currently combatting heat indices of 105 degrees. The dust will insert drier area, meaning the probability of rainfall will dwindle during the weekend.

As of Thursday, there was a 30 percent chance of rain Sunday in Tampa, according to the National Weather Service.

How Does Saharan Dust Originate?

Before the dust settles across the lower portion of the U.S., it is formed over the Sahara Desert due to an air layer in the late spring, summer and early fall, according to the National Oceanic and Atmospheric Administraton in a June 2025 report. The layer can venture thousands of miles and is tracked by NOAA.

After taking shape from atmospheric ripples, the Saharan air layer moves along the southern portion of the Saharan Desert and saturates the atmosphere with massive amounts of dust, scientist Dr. Jason Dunion told NOAA.

He added the layer usually springs into action in mid-June and peaks from late June to mid-August.

The outbreaks could target the lower half of the U.S., including Florida, Central American and Texas, he said in the report.

How Can Saharan Dust Impact Human Health?

Dust storms have been linked to increased respiratory symptoms, according to the National Institutes of Health.

The heightened PM levels of Saharan dust particles can negatively affect a person's respiratory system, irritating the lungs and possibly leading to cardiovascular concerns, the NIH reported.

PM stands for particulate matter and is a blend of solid and liquid particles lingering in the air.

Fine dust particles have a PM level of 2.5, elevated enough to enter a person's respiratory system and reach the lungs, the NIH reported. When inhaled, PM2.5 particles can trigger inflammation and stress in the lungs, damaging cells.

Penetration of the particles can also worsen cardiovascular diseases, the NIH reported.

Children, older people, women who are pregnant and people who have been diagnosed with respiratory diseases can be impacted by dust particles.

Windows and doors should be kept closed during dust storms, and air purifiers can be used to remove the particles, according to the NIH.